In the lecture, we learned about visual perception. We can have a better understanding on how the visual perception works by Gestalt Principles. Gestalt Principles are the rules that explain how we perceive objects as unified form within overall context. Main principles of Gestalt theory are proximity, similarity, continuity, closure, symmetry, and figure-ground.
Now we know what Gestalt theory is. Let's apply the theory to the work of art that triggers illusion.
These two prints are done by William Gillbert. Look at these two arts. What do you see at the moment you look at these? Most of you might say that when you guys view the artworks, you see the skulls. You are right. These two pictures create the illusions of skulls. In order to create or heighten such illusions, the author of these artworks used one of the principles of the Gestalt theory. Among many, the author, William Gillbert used figure-ground principle which means he used the fact that we tend to focus on what we believe is the central figure that we ignore the background. Therefore, when we view these artworks, we give attention to the central figure which is skull that we ignore the background of the paints, hardly noticing people in the background.